A 77-year-old woman was diagnosed as gastric Burkitt lymphoma. At that time, she complained headache and brain computer tomography revealed that she had subdural effusion. Cytology revealed that it was a metastasis of Burkitt lymphoma. Although we started chemotherapy, the patient deteriorated and she passed away.Subdural effusion by metastatic malignant tumor is very rare. Here we report a first case of subdural effusion in a patient of Burkitt lymphoma and review of the literature.